Gauge light



March 4, 1930. G. w. OSBORN GAUGE LIGHT Fiid Feb. 15, 1926 -boilerroom.

Also a concave reflector 1s formed inthe Patented Mar. 4; 1 1930' Q UNITED STATES OFFICE I GEORGE w. osBoRi I, or 61110;

GAUGE LIGHT Application filed February The objects of the invention are to provide means for illuminating the water gauge or i column of a steamboiler, in such a manner that the rays of light will be confined thereto 1.5 and will not be spread about the boiler room;

The devicefills a longfelt want since boilers are often placed in the darkestcorner of the "boiler room where the waterlevel in the gauge is difficult to read, and an explosion Nmay result if the. water level becomes too low inthe boiler.

' To accomplish these objects, an electric l p lighting bulb is enclosed within a metal cas ing which is provided with a narrow vertical front-opening through which-the rays of light are projected upon the full length of the water gauge, and the walls of this slot prevent the raysfrom scattering about the cover of the casing by means of which the rays are definitely projected upon the gauge. The invention also includes a casing having a narrow elongated slot in its front wall, means within thecasing for attaching an I electric lamp bulb, the said casing being provided with an opening its rear wall through which the lamp can readily be inserted or removed, and a cover therefor detachably hingedthereto as itslower end and an automatically locking fastener at the upper end which, when released, permits the cover'to I drop below'the lower end of the opening in j the casing, and when the cover is closed automaticallyflocks the same in closed position. I

. It also includes a" cover provided with a concave reflector in its inner surface which may be polished or may be coated with alumi-v Ynum' paint or other illuminating coating, or

the cover may be constructed ofawhite or f light colored metal such as aluminum.

"The invention further includes the details I e of construction andcombination and arrange- (4 mentjof. parts hereinafter described illus'- a vertical section of the device, Fig. 2 is a p 9 front elevation thereof and Fig. 3'i-s a -rear r5, 1192s,: .Seria1;No.-'88,384J

elevation-thereof, Figure 4: is'a plan of Figurel.

.Inthese views A represents an elongated ili'ollow fcasingprovided with a lamp socket or cnonection B for the lamp bulb C, which hangs. vertically in the casing. i the front wallofl the casing a narrow vertical'slot D is formed which is as long as the tube, of the water gauge, R, so as to per- I mit th'er'illnmination of the entire length of thegauge 'Overthis opening a heavy, plate .offglass E is attachedrby means of the rec- "tangi ular" frame F and screws G. A packing 'Hbehiiid the glass prevents the same from breaking;

The rear, wall of the casing is open at I to permit ready:access to-thelamp bulb' and a peter .for the. opening is provided with a hook sha'ped hinge.eyeKwhichcanbe insert-W ved inthe depending loop L at. the lowerend [of fith'e leasing, thus. forming a detachable fhiiigediconnection' therewithi'. This enables the coverf to' drop automatically away from thejopening whengreleased so as to. uncover theifullopening leading to the lamp. When i closedthecoveris locked in place by means 10f thelmetalloopor keeper .M pivoted at N to the Q sides of thev casing, .which fallsautomaticallyover the upper end: of the cover n when ritis elevatedintoplace. 7

,Anotch'Q adjacent tothel. upper end of the ;cover iseng agedwfith the inner side of the loopat'P when the cover istlosedQtihuspre- Venti-ng .thedlocking.v loop from being accidentallyfdisplaced.

l ng the i ne ffacei o'f the: cover is formed a concave mirror surface Q which will reflect and concentrate the rays of the lamp upon the gauge tube R. adjacent thereto and the. walls of the narrow slot will prevent the rays from diverging. If the cover is constructed of a bright metal such as aluminum it may not be necessary to polish the surface of the mirror, or the metal surface may be coated with aluminum paint or illuminating sub stance. Also the bottom face of the cover is inclined atS' to reflect the rays from the lamp I In the accompanying drawings, Fig. 1 isare shown to be inclined toward the vertical 1 sides of the narrow vertical aperture or slot in the front wall of the casing thus enabling them to reflect the lateral rays of the lamp through said aperture. 7

In this manner all the inner surfaces of the casing are employed to increase the illuminating power of the lamp and to direct the rays through the narrow aperture so that they will'not be wasted upon surrounding objects.

Having described the invention-what claim as new and desire to secure by Letters Patent is: V I 1 c a 1. In an illuminating device for a water gauge tube, the combinationwi th a vertical gauge tube of a lamp and a vertically elon- I gatedcasing therefor, said casing being providedwith a vertical elongated slot in its front wall and a glass thereover parallel'with c 2 said gauge tube, the back wall of saidcasing being provided with a concave mirroropposite to said lamp, and opposite to the normal water level in said tube, and also provided with a vertical back wall andwith vertical oblique side walls arranged todefiect the light of said lamp through said slotupon said tube, the bottom of said casing being inclined obliquely to the back wallito prevent p the downward dispersion of the rays of light. 7

2Q'In an illuminating device for a water gauge the combination with a vertical gauge tube of'a lamp and a vertically elongated casing'spaced therefrom, said casing being provided with a vertical elongated slot in its frontwall, and with a glassthereover paral-V 'lel with said gauge tube, the ba'ck wall of said casing being provided with a 'concave mirror opposite to said lamp, and opposite to the a normal water level in said tube, and also pro- 40 vided with a'vertical back wall and with oblique side walls arranged tod'eflect the li ht of said lamp'through said slot upon said tu e. the bottom of said casing being inclined obliquely to the back walltoprevent the downward dispersion of the rays of light, said rear 7 wall being hinged to the casing at the bottom and opening downwardly to a lower level than said ,casingto permitof ready access 'tosaidla-mp, I 1 i i '1 In testimonywhereof, -I hereunto setniy g hand this 13th day of November, 1925.

enoaen w. os solni V 

